It allows all merpeople to swim at the speed of 600 km/h. Their body is encased in bubbles and use it as a jet stream to swim faster.
It allows him to move water without touching it as well as expand it and mold it into different shapes. With this power a mermaid/merman can create balls of water, blasts of water or even geysers strong enough to lift people off the ground.
It is the power to create ice as well as create and control blizzards and snowfalls. This is an upgraded version of Hydro-Cryokinesis.
Hydro-Thermokinesis is the power currently possessed by Sirena, Zac, Lyla, and Nixie
It allows a merperson to heat and boil water. This can be used to create steam, super heat objects or raise bodily temperature. This is the most dangerous power of the three because, control can easily be lost and it can create so much heat and dryness that it can even easily dehydrate people or even create fires. There is a disadvantage to this power because although water can be heated, the mermaid with this power has no control over its movement. This power can come in handy when in need of a steam cover, melting ice, or drying off quickly.
It allows a merperson to change the viscosity or thickness of water. Gelidkinesis has been shown to be able to turn water into a jelly-like substance. After a short time however this power has been shown to wear off as the water reverts back to it's liquid state. There is a disadvantage to this power: it makes water or drinks undrinkable.
Is the power to turn water into a solid state, without freezing it. It can be seen as an enhancement of Gelidkinesis in that it solidifies water instead of merely jellying it.
It is the ability of combined substanciakinesis and gelidkinesis will equal the ability to explode water or jelly, and also be used to glue objects together or create enough sticky or jelly ease in objects causing them to poor bucket loads of goose or sticky slime.This has been used to manipulate and mold mud or slime.
Volume Reduction is possessed by Rita Santos, Nixie, Lyla, Zac and possibly Sirena
Volume Reduction is the ability to shrink objects. The hand motion for this power is to use the thumb and index finger and move up and down with the fingers.
Aerokinesis is the power possessed by Lyla
It is the power to create and control wind and air currents. This is an upgraded version of Hydrokinesis.
Telekinesis is the power currently possessed by Zac, Lyla, Sirena, and Nixie
It is the ability to move objects and people with the mind, often in ways not visible to the naked eye.
Invisibility is the power possessed by Zac, Sirena, Nixie, Lyla.
This power was introduced in Mako Mermaids, as it was not in H2o:Just Add Water. It is used primarily by placing a hand near their head and possibly clenching it into a fist, releasing it to become visible again. This ability also allows the user to conceal other people and things they are in contact with. Invisibility Detection is a power possessed naturally by Rita. Zac has used it with the help of the Trident.Electrokinesis is possessed by Rita Santos, Sirena, Nixie, possibly Lyla and Zac (with Trident).
This power can summon a bolt of lightning from the sky, and aim it at a spot on the ground or a target. It causes extreme lightning and power outages.
Hydro-Cryokinesis is possessed by Lyla.
Hydro-Cryokinesis is the ability to freeze water. This power can be used to create ice, cool down hot objects or even lower bodily temperature. It can be combined with Hydrokinesis, to create a ice ball. This can be enhanced to Cryokinesis.
Siren Singing is a natural merperson ability.
Sirena was asked to use this ability by singing the Enchantment Song, which presumably gives the Siren Singing power to whoever sings it, and is not a natural power. Mermen are presumed to have this ability as well, as the computer Zac was researching mermen on said that mermen have enchanting voices, like their female mermaid counterparts.